5DOF | pdb_00005dof

Crystal structure of Tetrahymena p19

• PDB DOI: https://doi.org/10.2210/pdb5DOF/pdb

• Classification: DNA BINDING PROTEIN
• Organism(s): Tetrahymena thermophila
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2015-09-11 Released: 2015-11-25 
• Deposition Author(s): Wan, B., Tang, T., Wu, J., Lei, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 
  0.220 (Depositor), 0.219 (DCC) 
• R-Value Work: 
  0.177 (Depositor), 0.176 (DCC) 
• R-Value Observed: 
  0.179 (Depositor) 

Literature

The Tetrahymena telomerase p75-p45-p19 subcomplex is a unique CST complex.

Wan, B., Tang, T., Upton, H., Shuai, J., Zhou, Y., Li, S., Chen, J., Brunzelle, J.S., Zeng, Z., Collins, K., Wu, J., Lei, M.

(2015) Nat Struct Mol Biol 22: 1023-1026

• PubMed: 26551074 
• DOI: https://doi.org/10.1038/nsmb.3126
• Primary Citation Related Structures: 
  5DOF, 5DOI, 5DOK


• PubMed Abstract: 
  

  Tetrahymena telomerase holoenzyme subunits p75, p45 and p19 form a subcomplex (7-4-1) peripheral to the catalytic core. We report structures of p45 and p19 and reveal them as the Stn1 and Ten1 subunits of the CST complex, which stimulates telomerase complementary-strand synthesis. 7-4-1 binds telomeric single-stranded DNA, and mutant p19 overexpression causes telomere 3'-overhang elongation. We propose that telomerase-tethered Tetrahymena CST coordinates telomere G-strand and C-strand synthesis.

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Organizational Affiliation: 
• National Center for Protein Science Shanghai, State Key Laboratory of Molecular Biology, Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China.
Shanghai Science Research Center, Chinese Academy of Sciences, Shanghai, China.
School of Life Science and Technology, ShanghaiTech University, Shanghai, China.
Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, California, USA.
College of Life Science and Technology, Huazhong Agricultural University, Wuhan, China.
Northwestern University Center for Synchrotron Research, Life Sciences Collaborative Access Team, Argonne, Illinois, USA.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Biological Assembly 3  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 3 assigned by authors.

Biological Assembly 4  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 4 assigned by authors.

Biological Assembly 5  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 5 generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 77.65 kDa 
• Atom Count: 5,735 
• Modeled Residue Count: 612 
• Deposited Residue Count: 652 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Telomerase-associated protein 19	A, B, C, D	163	Tetrahymena thermophila	Mutation(s): 0  Gene Names: TAP19
UniProt
Find proteins for D2CVN7 (Tetrahymena thermophila (strain SB210)) Explore D2CVN7  Go to UniProtKB:  D2CVN7

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A, B, C, D	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free:  0.220 (Depositor), 0.219 (DCC) 
• R-Value Work:  0.177 (Depositor), 0.176 (DCC) 
• R-Value Observed: 0.179 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 40.732	α = 90
b = 128.631	β = 105.05
c = 75.328	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data scaling
REFMAC	refinement
PDB_EXTRACT	data extraction
HKL-2000	data collection
Coot	model building

Structure Validation

Entry History 

Deposition Data

• Released Date: 2015-11-25 
Deposition Author(s): Wan, B., Tang, T., Wu, J., Lei, M.

Revision History  

• Version 1.0: 2015-11-25
  Type: Initial release
  
• Version 1.1: 2015-12-23
  Changes: Database references
• Version 1.2: 2024-10-09
  Changes: Data collection, Database references, Derived calculations, Structure summary